Cultivator



Feb.A 18, 1936. H. Llslus cUL'TIvAToR Filed Jan. 8, 1935 Een BY ATTORNEYPatented Feb. 18, 1936 PATENT OFFICE' CULTIVATOR Henry Lisius, Havelock,N. Dak.

Application January 8, 1935, Serial No. 880

4 Claims.

This invention relates to agricultural implements and especially tostraddle-rowdisk cultivators, the object being to provide means wherebythe gangs of disks may be kept in proper relation to the row of plants.In cultivating a crop, if one gang of disks should grip or dig in deeperthan the other gang, the cultivator will swing toward the side of themore lightly gripping gang and the plants are very apt to be damaged. Myinvention provides means whereby this tendency to slue around may beovercome and the cultivator made to properly follow the row. Theinvention is illustrated in the accompanying drawing and will behereinafter fully described, the novel features being particularlydefined in the appended claims.

In the drawing: y

Figure 1 is a plan view of a cultivator showing one embodiment of theinvention.

Figure 2 is a detail section on the line 2--2 of Figure 1.

Figure 3 is a section on the line 3-3 of Figure 1.

Figure 4 is a detail elevation of the disk support, the view point beingindicated by the line 4-4 in`Figure 1.

Referring more particularly to Figure 1, there is shown a frameconsisting of parallel transverse beams I and 2 having a central archedportion 3 whereby topping of the plants is avoided. A draw bar or tongue4 consists of vertically spaced fiat bars having their rear end portionsdisposed above and below the arch'3 and extending rearwardly beyond thesame, a bolt 5 connecting said bars between the beams and a spacer 6being fitted around the bolt to resist bending of the bars. Draftapplied to the front end of the draw bar by a tract-or or draft animalswill thus be transmitted to the frame to draw the cultivator along therow of plants. A seat standard 1 is secured upon the draw bar andcarries a, seat 8, as shown, and the frame bars are, of course, boltedtogether, spacers being provided around the bolts to maintain the spacedrelation of the bars. l

The cultivator disks 9 are rotatably mounted upon an axle in the usualmanner, the axle being secured in the lower end of a yoke IU and spacersbeing fitted on the axle between the disks. In

the forms of the invention shown, a boss or disk II is formed on the topof 4the yoke and has a series of notches or teeth on its upper side, asshown at I2, and a similar mating disk I3 is interposed between theframe and the disk II. The disk I3 has ribs I4 on its upper side toengage the sides of the frame and thereby prevent relative turning ofthe disk, and a threaded stud I5 rises centrally from the disk IIthrough a central opening in the disk I3 and through the .space betweenthe frame bars. A washer I6 5 and nut I1 mounted on the stud above theframe secures the yoke to the frame and the mating interengaging teethon the disks hold the gang c of cultivator disks in a' set angularrelation to the frame. '10

Secured rigidly to the rear ends of the drawy 'A bar members, and to a.filler block I8 secured between them, is a cross bar or plate I9 at theends of which are bearings 20, a rock shaft 2l being journaled in andextending through each l5 bearing. Each shaft has a pendent crank orpedal 22 at its inner end and an upwardly extending crank 2 3 at itsinner end, the pedals forming rests for the feet of the operator andeasily reached from the seat 8. The frame may 20 move pivotally upon thebolt 5 and a front steering bar 21 is pivoted to the draw bar betweenits ends.A Connecting rods 26 are mounted at their rear ends upon thecranks 23 and have their front ends pivoted to the steering bar 21. Dis-25 posed between the members of the draw-bar and fixed to the steeringbar is a sprocket gear 28 about which is trained a sprocket chain 29having its ends connected by links 30 with the respective ends of theframe bars "I and 2. It will 30 now be understood that the cultivatorgangs are adjusted to a normal angular position, with the steering bar21 at a right angle to the draw bar, before starting to travel along therow of plants. Then, if the right hand gang, for instance, should forany reason work ahead of the left hand gang' it will tend to dig deeperinto the ground' and cause the machine to veer or swing to the left andapproach so close to the plants as to cut 40 into them. To remedy thiscondition, the operator pushes upon the right hand pedal 22 therebyrocking the corresponding shaft 2| and exerting "a pull upon theattached rod 26 which will cause the steering bar 21 to rock. The framebars I, 45 2 will turn in unison with the bar 21 so that the left handgang will bev advanced and the right hand gang retarded, and themachine` returned to even travel.

From the foregoing description,A taken in connection with theaccompanying drawing, it will be seen that I have provided a compactmechanism which may be easily manipulated and by which the implement maybe caused to follow the row without causing any damage to the plants.

2 Having described my invention, what 1 claim 1. A cultivator comprisinga. frame, a draw bar pivoted to the frame, cultivator gangs carried .bythe ends of the frame, a gear mounted on the draw bar, a exbleconnection between the gear and the ends of the frame, and means forrocking the gear to advance one gang relative to the other gang.

2. A cultivator comprising a frame, a draw bar plvoted to the frame,cultivator gangs adjustable on vertical axes on the frame, a. gear onthe draw bar, a flexible connection between the gear and the ends of theframe, and means for rocking the gear to advance one gang relatively tothe other gang.

3. A cultivator comprising parallel transverse beams having archedcentral portions, a draw bar pivoted to the centers of said archedportions,

cultivator gangs adJustably mounted on vertical axesl on the ends of thebeams, a gear mounted on the draw bar, a exible connection between thegear and the ends of the beams, and means vfor rocking the gear toadvance one gang relatively to the other gang.

4. A cultivator comprising a frame, a draw bar pivoted to the frame,axles, cultivator discs rotatably mounted on the axles, a yoke for eachaxle, bosses having interdigitating teeth carried respectively by theframe and each yoke, vertically disposed bolts for adjustably connectingthe bosses to hold the discs in angular set positions, a gear mounted onthe draw bar, a ilexible connection between the gear and the ends of theframe, and means for rocking the gear to advance one of the axlesrelatively to the other axle.

HENRY msrUs.

